Algebra 1 Notes P49 111 Measures of Center and...
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A1S111MeasuresOfCenterAndVariation.notebook 1 May 04, 2017 Nov 2010:10 AM Algebra 1 Notes P49 111 Measures of Center and Variation Nov 2111:40 AM
Transcript of Algebra 1 Notes P49 111 Measures of Center and...
A1S111MeasuresOfCenterAndVariation.notebook
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Algebra 1 Notes
P49 111 Measures of Center and Variation
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Measures of Central Tendency
Mean Average
Median Order Numbers(Number in the Middle or Mean of two Middle Numbers)
Mode Most Frequent3 is the modeBiModal Data with 2 different Modes
2,3,3,4,5,6,8,9
= 40/8 = 5
= 4 + 5 = 9 9/2 = 4.5
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If No Outlier is in Data Use Mean...
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If Outlier is in Data Use Median...
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If you want Most Popular use Mode...
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If you want "Variation" of the Data...
Example 1
An amusement park hires students for the summer.
The students’ hourly wages are shown in the table.
a. Find the mean, median, and mode of the hourly wages.
b. Which measure of center best represents the data? Explain.
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Monitoring Progress 2
The table shows the annual salaries of the employees of an auto repair service.
(a) Identify the outlier.
How does the outlier affect the
mean, median, and mode?
(b) Describe one possible explanation for the outlier.
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3,4,5,6,7,7,8,9,9,10,11,12,14,16,18
Measures of Variation
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Example 3
Two reality cooking shows select 12 contestants each. The ages of the contestants are shown in the tables. Find the range of the ages for each show. Compare your results.
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Standard Deviations
3,4,5,6,7,7,8,9,9,10,11,12,14,16,18Measures of Variation
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Standard Deviation
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Measures how much values in a data set vary, or Deviate, from the mean...
Standard Deviation
Lowercase Sigma
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HW #61111 P590 #59,1115,1922
Please put your name and class period at the top of the homework.Also include the homework number.
Core Concept
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Core Concept
Core Concept
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Monitoring Progress 6
Find the mean, median, mode, range, and standard deviation of the
altitudes of the airplanes when each altitude increases by 1 miles.
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